Undoubtedly, Buick's Gran Sport cars are classics. These specially-built high-performance cars were first unveiled in 1965. Also, a lot of the cars – majorly the Skylark based versions – featured the Buick V8, which at 401 cu in, was the largest engine permitted by General Motors, and are widely believed to be the most lavishly built General Motors sports models of their time.

Furthermore, the Buick Gran Sport can be described as an underrated muscle car due to the awesome automotive capabilities inherent in this brand of Buick cars. However, these capabilities aren’t lost on Gran Sports enthusiasts as we’ve seen several vintage examples of the Buick Gran Sports get restored to perfection.

10 1965 Buick Skylark GS

via Pinterest

For a total sum of $151,000, this 1965 Buick Skylark Gran Sport has been restored to life and delivered to its new owner. The vintage car’s perfect restoration involves the re-assembling of its 401 cu in V8 which now produces 325 horsepower and 445 lb-ft of torque.

via Pinterest

Also, the engine is mated to a 3-speed manual transmission. Further upgrades on the car include a heavy-duty radiator and dual exhaust.

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9 1970 Buick GS Stage 1 (2 Door Hardtop)

via Barrett-Jackson

This 1970 Buick Gran Sport made it to the 2006 Barrett-Jackson due to how properly modified it is. The modification features an engine that has been completely rebuilt to stage 1 spec and mated to a turbo 400 transmission that has the floor mount console.

via Barrett-Jackson

Furthermore, the Buick Gran Sport is given an exquisitely finished black interior featuring a sport steering wheel, bucket seats, factory gauge with a tachometer as well as new exhaust with Flowmaster mufflers.

8 1967 Buick GS 340

via GMAuthority

This car is one of the 340-cubic-inch engine option introduced by Buick in 1967. It was given Platinum Mist body paint, red hood scoop as well as red wheels. For power, the car relies on the stock 340 V8 engine which was rated at 260 horsepower and 365 lb-ft of torque and mated to a Muncie 4-speed manual transmission.

Buick Gran Sport
via GM Authority

However, the transmission was rebuilt with M22 gears, a new clutch, and a new radiator. Other features include power steering, tachometer, and power brakes.

RELATED: 10 Things You Need To Know Before Collecting The 1966 Buick Wildcat

7 1967 Buick GS 400

via Mecum

For a gearhead, it doesn’t get better than having just 5,000 miles on a rebuilt 360 horsepower engine such as the one powering this modified 1967 Buick Gran Sport 400. The modification includes the refabricating of the car’s Turbo 400 automatic transmission while the car also features a completely new interior finished in black.

via Pinterest

Notably, the car has a straight and solid body while the door and rear side panels are original. Furthermore, it uses a tilt steering column and new Blueline radial tires among other modifications.

6 1968 Buick Skylark GS 400 Convertible

via Mecum

Mecum featured this extremely rare and modified 1968 Buick Skylark GS 400 Convertible a while back. On record, only 2454 units of this car were ever produced and this example also has power windows and seats.

via Mecum

The car is powered by a completely rebuilt engine and transmission while it’s also fitted with power steering and brakes. Other features are its tilt wheel and its new power top finished in white. The car is adorned in blue and has a white interior.

5 1969 Buick GS

via Mecum

Here, we have a 1969 Buick GS that has been completely restored. It runs on a 350 Cl engine mated to a Hurst 4-speed transmission. The interior looks as pristine as ever featuring bucket seats while all the features are adorned in Verde Green.

via Mecum

Also, the car is fitted with Buick rally wheels with Radial letter tires with the car’s entire body finished in an exotic custom green paint while the top is made of black vinyl.

4 1970 Buick GSX 455

via Barrett-Jackson

The Buick example is rare as only 118 units of the car were built. After receiving a ground-up restoration, this car now features a newly adorned original paint color of Saturn Yellow with code QQ (only available on the GSX). Also, stock parts on the car include its 455 Stage 1 engine, buckets seats, hood tachometer, and GSX package.

via Barrett-Jackson

Other features are the rally steering wheel, tinted wheel, and glass as well as power steering among others.

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3 1967 Buick GS 400 Skylark Hardtop

via CarFromUk

This greatly presented car is the 1967 model of the Buick Gran Sport 400 Skylark Hardtop, and it’s powered by a 400 cu in engine. During the restoration, the car had been stripped to its bare metal to expose all the rust and subsequently given proper bodywork before applying its satin black finish.

via CarFromUk

The interior features new upholstery, door panels, carpet, and dash pad while the front and back glass is also newly fitted.

2 1967 Buick Skylark GS California

via Mecum

Pro Touring fans will especially love this Buick for obvious reasons. It’s a 1967 Buick Skylark GS California that has been given a complete frame-off restoration, and it’s now powered by Quinn Automotive-built 402/400 horsepower big block engine mated to a 700R4 automatic transmission.

via Mecum

The car is fitted with Global West tubular suspension, 4-wheel disc brakes, Boyd Coddington wheels, and custom painted in Copper/Gray by Riley Customs. Notably, it also features a 2007 Buick Lucerne interior.

1 1969 Buick GS

via HotRod

Jim Hawthorne rode his luck and landed himself this 1969 Buick GS but in a deteriorated condition. Getting to work, Hawthorne contracted the restoration job to Nick Serwo of Ivyland Collision and Custom Restoration, Warminster, PA.

via HotRod

The car is powered by a 406ci V8 with an output of 441 horsepower which is then mated to a Muncie M20 wide-ratio 4-speed manual. Furthermore, the interior is fitted with a Deluxe light blue metallic vinyl bucket seat, while the car rolls on Hurst wheels and Firestone tires.

NEXT: 10 Coolest Features Found In The 1972 Buick Riviera

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